Effect of Iron Ions on Hydrocracking Water Injection
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In fact, for condensing steam turbines, the raw material of medium-pressure steam used is deoxygenated water. Therefore, it can be said that it is more than enough for a device that uses demineralized water to inject water into the hydrocracking process. The purpose of water injection is mainly to dissolve the two ammonium salts. One is the location of high-speed replacement, and the other is the location of air cooling. I think it should have no impact on this purpose, but I don’t know what impact it will have on the pipe wall and equipment pipes.
Iron ions? Where did it come from? The ion content in desalted water is strictly controlled. Iron ions will not exceed 3PPM. There is no problem for steel pipes in normal use, and there is a certain amount of iron ions in the water that can inhibit the progression of corrosion. The principle is the principle of chemical equilibrium. But if it is found that the iron ions in the water exceed the standard, it must be that corrosion has intensified and there must be a problem somewhere.
I have also thought about it. According to the concentration balance theory, the presence of iron ions should be able to inhibit corrosion. If there are really too many iron ions, then I think the most likely reason is that the deaeration effect of the deaerated water is not good. But if you want to use condensate water as demineralized water, apart from those dry data indicators, can you judge that the condensate water is enough for use because it is a condensing steam turbine with an air extractor and the medium-pressure steam feed is deoxygenated water?
After hydrocracking passes through the reactor, there are free sulfur ions, which is why it is afraid of producing ferrous sulfide with iron ions. A new crystallization of the trip. Who can help me?